you're not my crutch, i don't need a crutch." [ male announcer ] ask your doctor if chantix is right for you. and find out how you can save money on your prcription at chantix.com. se ople have had changes in behavior, hostility, agitaon, depressed mood and suicidal thoughts or actions while taking or after stopping chantix. if you notice agitation, hostility, depression or changes in behavior, thinking or mood that are not typical for you, or if you develop suicidal thoughts or actions, stop ting chantix and call your doctor right away. talk to your docr about any history depression or other mental health problems, which can get worse while taking chantix. some people can have allergic or serious skin reactions to chantix, some of which can be life threatening. if you notice swelling of face, mouth, throat or a rash stop taking chantix and see your doctor right away. do not take chantix if you've had a serious allergic or skin reaction to chantix. tell your doctor which medicines you're taking as they may work differently when you quit smoking. chantix dosing may be different if you have kidney problems. the most common side effect is nausea. patients also reported trouble sleeping and vivid, unusual or strange dreams. until you know how chantix may affect you, use caution wh driving or operating machinery.